import CryptoJs from 'crypto-js' //引用AES源码js
export default {
    // md5值计算
   fileMd5Sum(file) {
   	let CryptoJS = require("crypto-js");
    return new Promise(resolve => {
        const fileReader = new FileReader();
        fileReader.onloadend = ev => {
        resolve(
            CryptoJS.MD5(CryptoJS.enc.Latin1.parse(ev.target.result)).toString(
            CryptoJS.enc.Hex
            )
        );
        };
        fileReader.readAsBinaryString(file);
    });
   }
}